Transparency Pixel colour for Sprites on HP Prime

[matalog]

(05-21-2021 12:57 AM)toml_12953 Wrote:  What I do is have a background with no objects in one graphics page, then for each movement, I copy the background to a second page, BLIT the objects to the second page then copy that second page to G0. To the user it looks like the objects are moving over the background without disturbing it.

Do you do that every single time something moves?


How do we go about getting pixels of a GROB to be transparent? The program DIMGROB creator that I used had set some of those pixels to transparent, and they ended up white.